First flight air mail cover addressed to Bill Boeing, Jr., Seattle, Washington, October 5, 1935.
Stamped: "First Flight - Transpacific eastbound from Guam - Pan American Clipper."
First flight air mail cover addressed to Colonel L. G. Blackman, Honolulu, Hawaii, October 8, 1934.Stamped: "First Flight - United States Air Mail – Honolulu, Oahu, T.H. [Territory of Hawaii], USA."
First flight air mail cover addressed to Dr. Hans Joachim Post, Hamburg, Germany, from Dr. Fred Post, Peekskill, New York, October 28, 1928. Stamped: "First Flight Air Mail via Graf Zeppelin - United States – Germany. Oct. 28, 1928. Via Air Mail."
First flight air mail cover addressed to Hudson's Bay Company, Vancouver, B.C., October 18, 1938.Stamped: "First day cover - Via air mail from San Francisco."
First flight air mail cover addressed to Master Bebo Boeing, Seattle, Washington, July 1, 1927. Stamped: "First Flight Under Contract - Chicago to San Francisco - Transcontinental Air Mail Route, Omaha, Nebraska."
First flight air mail cover addressed to Mr. Donald R. Drew, Seattle, Washington, from William E. Boeing, May 3, 1938.Stamped cachet: "United States Air Mail - Juneau-White Horse - First Flight."
First flight air mail cover addressed to Mr. Donald R. Drew, Seattle, Washington, from William E. Boeing, May 8, 1938.Stamped cachet: "United States Air Mail - Juneau-Fairbanks - First Flight."
First flight air mail cover addressed to Mr. Donald R. Drew, Seattle, Washington, from William E. Boeing, May 8, 1938.Stamped cachet: "First Official Air Mail Flight - White Horse, Canada-Juneau, Alaska."
First flight air mail cover addressed to Mr. L. G. Blackman, Honolulu, Hawaii, October 8, 1934.Stamped: "First Flight - United States Air Mail - Hilo, Hawaii, T.H. [Territory of Hawaii], USA."
First flight air mail cover addressed to Mr. Milo [Rauek?], Honolulu, Hawaii, October 8, 1934.Stamped: "First Flight - United States Air Mail - Wailuku, Maui, T.H. [Territory of Hawaii], USA."